CitiMonk,
We need to look at the ancient times, when traitions were not traditions yet. The practitioners were essentially scientists of those days and their own selves were their labs. Their truth was evolving too, much the same way today’s science does.
A scripture gives an appearance of perfection because it belongs to such a distant past. Not all scriptures are alike. In the context of yoga, undisputed acceptance is only awarded to Bhagwad-Geeta and Yoga Sutra. The rest either present certan specific aspects (like today’s styles) or speculative theories based on certain premises. In fact, studying them provides good perspective of progressions and a time-line over which this ancient wisdom evolved.
Our difficulties today are many. Sanskrit, the language of the scriptures is not used anymore. (In India we were lucky to learn it in schools, but it is not in daily use anymore) Many people take anything in Sanskrit as sacred as mantras. Some times we also take any scripture and accept it as the final word.
Secondly, our lives are a lot more materialistic, while this scientific community of the ancient times used to be groomed for the research work in much less hostile environment.
Thirdly, the most distinghushing part of yoga traditions is that blind adherance is not intended or expected. All truth is to be self-realized. So, all apparent assertions in the scriptures are actually hypotheses given for self-validation.
Long and short, your experiencing the flow and a sense of doing something right is of paramount importance. Even though there is no need to invent the wheel, we have to experiment, adapt, fine-tune, tweak and personalize. In doing so, we are not betraying the scriptures, but rather following their “traditions” of experimenting with the truth.